EP3110364B1 - Instrument dentaire - Google Patents

Instrument dentaire Download PDF

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Publication number
EP3110364B1
EP3110364B1 EP15703493.5A EP15703493A EP3110364B1 EP 3110364 B1 EP3110364 B1 EP 3110364B1 EP 15703493 A EP15703493 A EP 15703493A EP 3110364 B1 EP3110364 B1 EP 3110364B1
Authority
EP
European Patent Office
Prior art keywords
cutting
cutting edges
head
smooth
contour
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP15703493.5A
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German (de)
English (en)
Other versions
EP3110364A1 (fr
Inventor
Karl-Heinz Danger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gebrueder Brasseler GmbH and Co KG
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Gebrueder Brasseler GmbH and Co KG
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Publication of EP3110364A1 publication Critical patent/EP3110364A1/fr
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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C3/00—Dental tools or instruments
    • A61C3/02—Tooth drilling or cutting instruments; Instruments acting like a sandblast machine

Definitions

  • the invention relates to a dental instrument with a shaft and a connected thereto, provided with cutting head.
  • a classic design variant is a so-called Rosenbohrer, which is suitable for the removal of carious tissue.
  • a fissure drill which has a rounded, conical head, which is provided with axially parallel, straight cutting edges, wherein individual cutting edges have a discontinuous cutting contour.
  • the US 2009/053674 A1 shows a dental cutter, in which the substantially axially parallel extending blades are serrated.
  • the invention has for its object to provide a dental instrument of the type mentioned above, which allows a simple construction and simple, inexpensive to manufacture a vibration-free application and has a high removal rate.
  • Such cutting with interrupted cutting contour are formed according to the invention in the form of a serrated edge.
  • Such serrations are already known from the field of knives.
  • individual regions of the cutting contour in the dental instrument according to the invention are radially further than other cutting edges.
  • the projecting portions of the cutting contour are brought into engagement.
  • Upon rotation of the instrument passes a subsequent smooth cutting edge into cutting engagement.
  • With the following smooth cutting edge it is then possible to smooth the surface, which has been processed by the interrupted cutting contour in irregular areas, in order to simultaneously divide the materials to be removed, so that they can be easily removed from the cutting gaps.
  • the embodiment provided according to the invention results in a considerable reduction of the vibrations occurring. It is an almost vibration-free machining operation possible.
  • Both the projecting, as well as the recessed areas of the cutting contour are sharp and cutting.
  • the smooth cutting edges and the cutting edges with interrupted cutting contour each have different radii in a plane perpendicular to the axis of rotation of the head.
  • the cutting edges with the interrupted cutting contour over their axial length are the same or that the interrupted cutting contour over the axial length of the head changes. It is possible, for example, to provide each of the cutting edges with an interrupted cutting contour with a coarser subdivision or design than other cutting edges on the head, which can have a finer cutting contour.
  • a serrated edge it is possible, for example, to vary the radius of the serration, so that the individual blades with the serrated edge, which are arranged on the circumference of the head, have a different serrated edge.
  • the dental instrument which is designed as a rose drill, for example, four, six or eight cutting. It is particularly advantageous if two of these cutting edges converge at the front-side, distal end of the drill in a transverse cutting edge, so that the instrument according to the invention also has a high removal rate in the axial direction.
  • Another embodiment is to arrange the cutting in so-called groups. This would require at least two groups with at least one tooth (described above). In particular, three or more groups would be advantageous.
  • the production of the dental instrument according to the invention is preferably carried out either by means of an additive manufacturing process or an ablative laser process.
  • the ablative laser process apart from the shaft, in particular the head can be manufactured by means of the laser process from a semifinished product or a blank.
  • the use of a short-pulse laser or an ultra-short pulse laser is advantageous. By means of such lasers smallest material volumes can be evaporated, without the structure of the rest of the workpiece is affected or changed.
  • a DLD Direct Laser Depositioning
  • a selective laser sintering process is also possible, for example.
  • Such methods are time-saving and inexpensive to use and allow geometries of the inventive head of the dental instrument, which can not be produced by classical grinding or milling.
  • the dental instrument according to the invention can be made for example of steel, carbide or ceramic.
  • the dental instrument according to the invention comprises a shaft 1, which is dimensioned in the usual way and provided with clamping and power transmission means.
  • the shaft 1 is rotatable about a central axis of rotation 5.
  • a neck 6 connects, on which a head 2 is formed.
  • the head distributed around the circumference on a series of smooth edges 3 and 4 cutting edges with interrupted cutting contour.
  • smooth cutting edge is understood according to the invention to mean a cutting edge which is not interrupted and runs steadily.
  • the cutting edges 4 with interrupted cutting contour are formed in the embodiment shown in the form of a serrated edge.
  • the wave contour or the serrated edge has projecting cutting areas 7 and recessed cutting areas 8. These are consistently sharp and cutting, so that both the protruding cutting areas 7 and the set-back cutting areas 8, in particular in the case of a radial movement (relative to the axis of rotation 5) of the head 2, material is removed.
  • a rotation of the head 2 follows on a cutting edge 4 with interrupted cutting contour a smooth cutting edge 3, as shown in particular from the illustration of Fig. 3 is apparent.
  • the Fig. 3 shows an embodiment with a total of eight cutting edges, with four smooth cutting edges 3 and four cutting edges 4 are provided with an interrupted cutting contour alternately.
  • the formed between the cutting chip space is provided with the reference numeral 10.
  • the shows Fig. 3 in that at least two of the cutting edges 4 converge with an interrupted cutting contour on the face side and form a transverse cutting edge 11.
  • the Fig. 3 shows an envelope 9, which results in rotation of the instrument in the respective radial section plane through the outer edges of the cutting edges 3, 4.
  • the envelope 9 according to Fig. 3 is circular. It can be seen that in the illustrated embodiment, the respective radii of the smooth cutting edges 3 and the above cutting portions 7 of the cutting edges 4 with interrupted cutting contour have the same radius.
  • the Fig. 4 shows a radial sectional view of the embodiment of the FIGS. 2 and 3 , It can be seen that the teeth all have the same tooth heights and therefore the same radius. All teeth thus cut evenly with their raised from the serrated areas areas on the circumference.
  • FIGS. 5 and 6 show a further embodiment variant in which alternately different teeth are provided.
  • the teeth 4 with the interrupted cutting contour have a larger diameter or radius than the smooth cutting edges 3. This is particularly in Fig. 6 clarified.
  • the cutting edges 4 with the serrated edge work during the cutting process before cutting, while the smooth cutting edges 3 in the form of a finishing process.
  • Such a design of the blades is not only suitable for classic rose drills, but also for milling cutters, which are preferably used in dental technology.
  • FIGS. 7 and 8 represent micrographs that result in a comparison between a conventionally produced material and a material produced by an additive process.
  • the microsection shown is a conventionally produced material, which has the typical structure of a drawn steel with subsequent heat treatment.
  • the longitudinal carbides in the martensitic matrix are clearly visible.
  • FIG. 8 a finish of a material produced by an additive laser reflow process.
  • a coarse, martensitic microstructure with fine carbide precipitations can be clearly seen in the microstructure view have special arrangement. It proves to be advantageous in additively produced workpieces that they do not form any hardening cracks, as is the case with conventionally produced workpieces.

Landscapes

  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)

Claims (6)

  1. Fraise boule avec une tige (1) et une tête (2) reliée à celle-ci, pourvue de tranchants, caractérisée en ce que des tranchants lisses (3) et des tranchants (4) avec un contour de coupe discontinu sont réalisés autour de la périphérie de la tête (2) et que les tranchants (4) avec le contour de coupe discontinu sont réalisés sous la forme d'une lame ondulée.
  2. Fraise boule selon la revendication 1, caractérisée en ce que des groupes de tranchants lisses (3) et des groupes de tranchants (4) avec un contour de coupe discontinu sont disposés en alternance au niveau de la périphérie de la tête (2).
  3. Fraise boule selon l'une quelconque des revendications 1 ou 2, caractérisée en ce que les tranchants lisses (3) et les tranchants (4) avec un contour de coupe discontinu présentent des rayons différents dans des plans perpendiculaires à un axe de rotation de la tête (2).
  4. Fraise boule selon l'une quelconque des revendications 1 à 2, caractérisée en ce que les tranchants lisses (3) et les tranchants (4) avec un contour de coupe discontinu présentent des rayons identiques dans des plans perpendiculaires à un axe de rotation de la tête (2).
  5. Fraise boule selon l'une quelconque des revendications 1 à 4, caractérisée en ce que les tranchants (4) avec un contour de coupe discontinu sont réalisés de manière identique ou différente sur toute leur longueur axiale.
  6. Fraise boule selon l'une quelconque des revendications 1 à 5, caractérisée en ce que l'instrument est fabriqué au moyen d'un procédé de fabrication additive.
EP15703493.5A 2014-02-26 2015-01-26 Instrument dentaire Active EP3110364B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014203451.5A DE102014203451A1 (de) 2014-02-26 2014-02-26 Dentalinstrument
PCT/EP2015/051497 WO2015128138A1 (fr) 2014-02-26 2015-01-26 Instrument dentaire

Publications (2)

Publication Number Publication Date
EP3110364A1 EP3110364A1 (fr) 2017-01-04
EP3110364B1 true EP3110364B1 (fr) 2019-10-23

Family

ID=52464344

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15703493.5A Active EP3110364B1 (fr) 2014-02-26 2015-01-26 Instrument dentaire

Country Status (5)

Country Link
US (1) US20160367337A1 (fr)
EP (1) EP3110364B1 (fr)
DE (1) DE102014203451A1 (fr)
ES (1) ES2768748T3 (fr)
WO (1) WO2015128138A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016205396A1 (de) 2015-12-11 2017-06-14 Hopf, Ringleb & Co. Gmbh & Cie. Schleifinstrumente für dentale Zwecke, Herstellung eines Rohlings sowie Verfahren zum Herstellen eines Rohlings bzw. eines Schleifinstruments
CA174524S (en) * 2017-05-03 2018-04-20 Panthera Dental Inc Dental screwdriver
CA174776S (en) * 2017-05-16 2018-04-20 Panthera Dental Inc Dental screwdriver
DE102020131103A1 (de) * 2020-11-24 2022-05-25 Laser Zentrum Hannover E.V. Spanabhebendes Werkzeug für die Dentalbehandlung, insbesondere Endodontie-Feile, sowie Verfahren zum Herstellen eines spanabhebenden Werkzeuges

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999008617A1 (fr) * 1997-08-20 1999-02-25 Kaltenbach & Voigt Gmbh & Co. Instrument medical ou dentaire et outil pour ledit instrument
US20070248935A1 (en) * 2006-04-24 2007-10-25 Gebr. Brasseler Gmbh & Co. Kg Dental drill
DE102010010589A1 (de) * 2010-03-08 2011-09-08 Gebr. Brasseler Gmbh & Co. Kg Dental- oder chirurgisches Werkzeug

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR792045A (fr) * 1934-07-26 1935-12-21 Foret pour l'art dentaire
DE19823720C1 (de) * 1998-05-27 1999-10-21 Brasseler Gmbh & Co Kg Geb Dentalbohrer
US6164876A (en) * 1999-10-30 2000-12-26 Tungsten Industries, Inc Cutting tool
DE102007016600A1 (de) * 2006-04-11 2007-10-18 Gebr. Brasseler Gmbh & Co. Kg Fissurenbohrer
JP5205646B2 (ja) * 2007-08-01 2013-06-05 マニー株式会社 ステンレススチールバー
US20090053674A1 (en) * 2007-08-22 2009-02-26 Gebr. Brasseler Gmbh & Co. Kg Dental drill

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999008617A1 (fr) * 1997-08-20 1999-02-25 Kaltenbach & Voigt Gmbh & Co. Instrument medical ou dentaire et outil pour ledit instrument
US20070248935A1 (en) * 2006-04-24 2007-10-25 Gebr. Brasseler Gmbh & Co. Kg Dental drill
DE102010010589A1 (de) * 2010-03-08 2011-09-08 Gebr. Brasseler Gmbh & Co. Kg Dental- oder chirurgisches Werkzeug

Also Published As

Publication number Publication date
ES2768748T3 (es) 2020-06-23
EP3110364A1 (fr) 2017-01-04
WO2015128138A1 (fr) 2015-09-03
DE102014203451A1 (de) 2015-09-10
US20160367337A1 (en) 2016-12-22

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